非滚动动画。实现了一版，不过好像不是很好看的样子，姑且放上来。

效果：

代码：

        let target = this.editBox.getComponent(cc.EditBox).string;
        //跳动动画
        let now = this.textNode.getComponent(cc.Label).string;

        //将数字切割成一个一个的
        let breakUp = (num)=>{
            if(typeof num == 'number') num = num + '';
            let arr = [];
            for(let i = num.length - 1; i >= 0; --i){
                arr.push(num[i]);
            }
            return arr;
        }

        let targetArr = breakUp(target);
        let nowArr = breakUp(now);

        let max = 0;
        let arr = targetArr.length > nowArr.length ? targetArr : nowArr;
        //选出最长
        for(let i = 0; i < arr.length; ++i){
            let t = targetArr[i] ? targetArr[i] : 0;
            let n = nowArr[i] ? nowArr[i] : 0;
            
            let diff = t < n ? (10 - parseInt(n) + parseInt(t)) : t - n; //如果目标数比原来的数小，那就要绕一圈，例： 7 -> 2 ,要 8，9，0，1，2
            if(max < diff) max = diff;
        }
        console.log('max值:',max)
        //进行动画,0.1秒更新一次文本 形成跳动感觉
        let index = 0;
        this._updateText = ()=>{
            ++index;
            let text = ""; //将要显示的文本
            for(let i = arr.length -1; i >= 0; --i){ //由于是从后往前记录的,现在也要从后往前拼接
                let n = parseInt(nowArr[i] ? nowArr[i] : 0) + index;
                if(targetArr[i] < nowArr[i]){
                    n = n >= 10 ? n - 10 : n; //转一圈
                    n = n > targetArr[i] && n < nowArr[i] ? targetArr[i] : n; //如果超过目标值
                    console.log('n的值：',n,i,index)
                }else{
                    n = n >= targetArr[i] ? targetArr[i] : n; //如果大于目标值，则等于目标值
                }
                if(targetArr[i] == undefined) continue;
                text += n +'';
            }
            
            this.textNode.getComponent(cc.Label).string = text;
            if(index >= max) this.unschedule(this._updateText);
        }
        this.schedule(this._updateText,0.1);